Research on application of flowforms in combination with planted constructed wetland for improving water quality of urban polluted lakes
- 25 Downloads
With continuously increasing urbanization in Vietnam, urban lakes pollution by domestic wastewater has become a serious issue, which results in degradation of lake water quality and consequent deterioration of landscape as well as environment for urban residents. Finding low-cost, simple and sustainable solutions would help to overcome that issue in Vietnam’s context. This study aims at proposing a solution which includes low-cost, nature- and landscape-friendly processes such as wetlands and flowforms for improving polluted urban lakes. The study was carried-out on a pilot system consisting of a cascade of flowforms and a planted constructed wetland with flow recirculation. Water samples used in this study have been collected from an urban lake in Hanoi, which receives wastewater from a densely populated residential area. The research results have demonstrated that this solution could achieve high treatment efficiencies: Color - 92%, Chemical oxygen demand (COD) - 92%, Ammonia (NH4+-N) - 98% and Total Phosphorus (TP) - 87%. The effluent quality could meet requirement by Vietnam’s National technical regulation on surface water quality QCVN 08-MT:2015/BTNMT, level B1 in terms of the above mentioned parameters.
KeywordsUrban lake pollution water landscape flowform wetland low-cost
Unable to display preview. Download preview PDF.
- 3.Hu Y., Zhao Y., et al.: High rate nitrogen removal in an alum sludge-based intermittent aeration constructed wetland. Environmental Science & Technology, 46(8), 4583-4590 (2012).Google Scholar
- 4.Schwuchow J., Wilkes J., Trousdell I.: Energizing water – Flowform technology and the power of nature, Sophia Books (2010).Google Scholar
- 5.Ung T. T. H., Leu T. B. et al.: Research on application of flowforms to improve water quality and create environment-friendly landscapes at polluted lakes. Grant No134-2017/KHXD-TD. National University of Civil Engineering (2018).Google Scholar
- 6.APHA, AWWA, WEF: Standard methods for the examination of water and wastewater. 19th Edition, American Public Health Association, Washington, D.C., USA (1995).Google Scholar